Functional Description
Page 30
3.3
Ethernet
The NL34 supports:
Two uplink ports:
-
ETH1 and ETH2 or
-
ETH25 and ETH26 (fiber ports, optional)
Mechanical connection of Ethernet ports ETH1 to ETH24: push-pull variant (Harting
concept)
3.3.1
Front Connection
Note: It is not mandatory to have the same coding on all Ethernet ports. The coding of
the Ethernet front connectors can be different for rows ETH1 to ETH12 and ETH
13 to ETH24.
3.3.1.1
Fast Ethernet D-Coded
Note: If the NL34 is equipped with D-coded Ethernet connectors, there are always two
A-coded connectors to allow gigabit uplink:
Table 9.
Connector types – Ethernet (4-pin, M12, D-coded)
Note: For railway rolling stock installation, the mating connector must be an approved
crimp connector.
Table 10.
Pin assignment – Ethernet (4-pin M12)
Table 11.
Signal mnemonics – Ethernet
Please
for more information.
Figure 1, Front interfaces on page 11
for the position of the connectors.
Connector
Type
On NL34
4-pin M12 receptacle, D-coded
e.g., Conec SAL-12D-IKHW4/A6090
Mating
4-pin M12 plug D-coded
e.g., Harting Electronics 21 03 881 1430
1
TX+
2
RX+
3
TX-
4
RX-
Signal
Direction
Function
RX+/-
in
Differential pair of receive data lines for 10BASE-T or
100BASE-T
TX+/-
out
Differential pair of transmit data lines for 10BASE-T
or 100BASE-T
3
1
2
4
